Yup, carve em all the time
http://kepisbushcraft.blogspot.com/2011/05/mors-kochanski-try-sticks.html
http://kepisbushcraft.blogspot.com/2010/02/mors-kochanski-try-stick.html
http://kepisbushcraft.blogspot.com/2011/05/mors-kochanski-try-sticks-cut-names.html
http://kepisbushcraft.blogspot.com/2010/04/try-stick.html
I found out how to make them using your pics, so thanks mate.
Still need to figure the whistle out but i've got the rest.
The square hole is my favourite, used it on my bowdrill and folding bucksaw for the string.
Has so many uses. Plus if you build benches and shelters etc it's really strong and looks great.
How many folk can carve one?
It's good fun to do.